why does arguing help us think better?
Page 203 why does arguing help us think better? Hugo, Mercier, and Dan Sperber have their theory. Engaging an active debate puts us in the position of evaluating others arguments, not simply constructing our own. Such objective analysis unclouded by self interest, Confirmation bias, makes the most of humans discriminating intelligence, but there are additional reasons why confrontations enhance are cognitive reasons that are likewise rooted deep in human nature. For example, there's the simple fact that conflict irresistibly sees our attention and motivates us to learn more.
— from Who Is Flying (Self, Nature & Nurture)